Keep the old motor running!

He is 80. She is 20.
It was the talk of the town when an 80 year old man married a 20 year
old girl.

After a year of marriage she went into the hospital to give birth.
The nurse came out to congratulate the old fellow saying "This is
amazing! How do you do it at your age?"
He answered,"You got to keep the old motor running."

The following year the young bride gave birth again. The same nurse
said,"youre amazing, how do you do it"
He again said "You've got to keep the old motor running".

The same thing happened the next year. The nurse then said
"Well,well,well, you certainly are quite a man.
He responded,"You've got to keep that old motor running."

The nurse said,"Well you better change the oil, this one is black "